3U 8963 then Y8 7566 at Pudong
Chengdu → Shanghai → Shenzhen
Timetable, Shanghai time
11:453U 8963 from Chengdu at the gate
10:30Y8 7566 to Shenzhen leaves the gate
22 h 45 apart on the timetable, overnight
Y8 7566 leaves 22 h 45 after 3U 8963 arrives on the timetable: more than half a day, so not a connection we count.